Improvement in sewing-machine casters



G. KQPROCTOR.

SEWING-MACHINE CASTERS,

Patented July 10, 1877 N PETERS. PHOTULITHOGRAPHER, WASHlNGi'ON. D c

UNITED STATES PATENT OFFICE.-

GEORGE K. PROGTOR, OF SALEM, MASSACHUSETTS.

IMPROVEMENT IN SEWING-MACHlNE CASTERS.

Specification forming part of Letters Patent Nol92,877, dated July 10,1877; application filed December 12, 1876.

To all whom it may concern:

Be it known that I, GEORGE K. PROCTOR, of Salem, in the county of Essexand State of. Massachusetts, have invented certain new and usefulImprovements in Sewing-Machine Casters, of whichthe following is aspecification:

This invention relates to certain improvements in sewing-machinecasters, such as illustrated in the patent to James K. Proctor, No.145,011, dated November 25,1873; and my invention consists in a barhaving a guiding-notch and a pin, in combination with two curvedcaster-carrying arms provided with downwardly-projecting ends, havingbooks which engage with the pin of the aforesaid bar, and linksconnected with the sewingmachine frame and with the caster-carryingarms, together with a novel arrangement of holding pawls and levers, theparticular construction and arrangement of which will be now fullyhereinafter described and definitely claimed.

Figures 1 and 2 are inside elevations of each end, respectively, of thecaster arrangement, with the sewing-machine stand at rest, asordinarily; Fig. 3, an inside elevation of the end of the casterarrangement which is shown in Fig. 2, but with the, sewing-machine standatrest on its casters; Fig. 4, a sectional detail view on line w 01:,Figs. 1 and 2 Fig. 5, a plan view of a portion of Fig. 2; Fig. 6, asectional detail view on line y 3 Fig. 1, and Fig. 7 a sectional detailview on line z 2:, Fig. 6.

Inthe drawings, A represents the lower .part of an end frame of asewing-machine stand, and B B two caster-wheels, which are located atsuch end frames. These casterwheels B B are carried on at each end ofarm 0, and the arm at one end is suspended through a link-arm, D, fromthe inside of the end frame A, and near its other end it is hung to abar, E, which turns against the under side of the rod F, having thetreadle-fcet of the machine, and extends thereunder to the other endframe, A, of the sewing-machine stand, and is then similarly connectedto another arm, O, carrying casters B and B ,'like the arm 0, and alsosimilarly arranged and hung to such end frame A by a link, D.

These two caster-carrying arms make, with the connecting-bar E, abovedescribed, the

caster-frame of the attachment, and in so far into and out of a positionof rest for the stand. A

Each arm 0 and G extends downward and forms a hook, b, which serves as abearing for the pin 61, having a head,f, of an arm-extension, G, of barE. This curving and arranging of the arms 0 and C, and theirhook-connection to the bar E, together with the linksuspension of thesaid arms, as described, secures the caster-frame to the stand, as isobvious. Each arm 0 and 0 plays through a notch, H, of the bar E, whichis under the treadle-rod F, and by this notch, in connection with theheaded pin 01, the arms 0 and G are held from lateral play as operated.

The hook-connections of the arms 0 and U to the bar F enable the severalparts to be readily attached to and detached from the sewing-machinestand, as is obvious, and also lessens the cost of the manufacture andthe adaptation of the caster attachment.

J, the treadle-lever, for operating the caster-frame and lifting themachine on its casters; L, a pawl, hung to said lever J and in positionto engage, by its hook-shaped edge g, with the hook-shaped edge h of thecasterarm 0, so as to fasten the caster-frame when its casters are in aposition of rest on the floor.

To release this pawl L from engagement, simply press on its end Z.

By having the arm 0 above the treadle-rod F, and also connected to thebar E, all substantially as shown and described, the several parts ofthe caster attachment are held in proper place, whatever the position ofthe stand in transportation, &c.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

- 1. The bar E, constructed with the guiding- 2. The holdingpawl L, ineombination with notch H, and provided with'the pin (1, in comthetreadie-iever J and caster-carrying arm 0, bination with the curved arms0 O, carrying all as described, for the purpose specified. thecasterwheels, and provided with the downwardly-bent ends, having hooksb, con- GEO. K. PROOTOR. nected with ,the pin (1 of the her E, a,nd thei I links D D, Connected with" the sewing-ma- Witnesses:

chine frame, and with the caster-carrying EDWIN W. BROWN,

arms, as and. for" the purpose set forth. JLK. PROOTOR.

